A sick mother was jailed after hunting down her own teen son on Facebook to have sex with him.

The Northern California mother is accused of having sex with her teen son. She was distanced from the boy most of her life when she found him on Facebook last year, a police source told the news media.

"It seems that she had not had any contact with her son for 15 years, who is now 16 years old," the source told the news media.

"She contacted him late last year through Facebook and sent him inappropriate messages," said the source.

Police in Napa, California, were serving her a search warrant, when they found Mistie Atkinson, 32, and her son in a hotel room, authorities said.

She was arrested and charged with four felony counts, including incest, oral copulation with a minor and contacting a minor for sex using electronic communication.

The fourth charge is sending nude photos to the teen, a prosecution source told the news media.